/*
 * Copyright (c) 2023 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/**---
 description: >  
    The type of a function expression is an object type containing a single call signature with parameter 
    and return types inferred from the function expression's signature and body.
 module: ESNext
 isCurrent: true
 ---*/


import { Assert } from '../../../../suite/assert.js'

type Greeting = 'Hello, world';
let x: Greeting = 'Hello, world';
function f(x: Greeting): string {
  return x;
}
Assert.equal(f(x), "Hello, world");
function f2<T>(x: T): T {
  return x;
}
let a = f2<number>(10);
Assert.equal(a, 10);
let b = f2<string>("hello");
Assert.equal(b, "hello");